Your marriage is pretty good, your bank accounts are seperate, you buy the tickets all the time, your ticket wins the jackpot, only your signature is on the ticket. For conversational purpose you take home $50 million after all withholdings. and say before you were a millionare, you spend very little on yourself while your spouse tends to spend more. Keep in mind you will want to invest some of those winnings, so when do you do that, before or after splitting the money?

What amount would you keep for yourself to do whatever you please?

What amount would you give to your spouse to do whatever he/she pleases to do?

Question, do you love your wife? Do you communicate with each other? And last, do you have each others back if something bad happens? If all is yes, give her half and talk about savings, investing and MAKING THE MONEY LAST FOR A VERY LONG TIME. Do not take a chance on girls dating you for your money.